Numerical linked cluster spectroscopy of quantum spin ice

          @misc{ scivideos_PIRSA:17060051,
            doi = {10.48660/17060051},
            url = {https://pirsa.org/17060051},
            author = {Singh, Rajiv},
            keywords = {Quantum Matter},
            language = {en},
            title = {Numerical linked cluster spectroscopy of quantum spin ice},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2017},
            month = {jun},
            note = {PIRSA:17060051 see, \url{https://scivideos.org/index.php/pirsa/17060051}}
          }
          

Abstract

Numerical Linked Cluster (NLC) expansions can accurately compute thermal properties of quantum spin models in the thermodynamic limit in certain parameter regimes. In classical spin-ice models, where all correlations remain short-ranged down to T=0, these expansions can be convergent even at low T. However, for quantum spin-ice models, they converge only when either temperatures are not too small or there is a strong magnetic field present. To turn these studies into a spectroscopy of exchange parameters, when multiple exchange constants are relevant, is a challenge both because of the limited temperature-range of validity of effective spin-half models and difficulties in isolating magnetic properties in experiments at intermediate and high temperatures. We discuss ways in which such a spectroscopy can proceed.